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Note 7 - Patents (Tables) | 6 Months Ended
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Jun. 30, 2022
Notes Tables |
Schedule of Finite-Lived Intangible Assets [Table Text Block] |
|  | June 30, 2022 |  |  |  |  |
|  | Cost |  |  | Accumulated Amortization |  |  | Net |
Patents-foundation intellectual property |  |  | 1,377,863 |  |  |  | (1,127,013 | ) |  |  | 250,850 |
Total |  |  | 1,377,863 |  |  |  | (1,127,013 | ) |  |  | 250,850 |
|  | December 31, 2021 |  |  |  |  |
|  | Cost |  |  | Accumulated Amortization |  |  | Net |
Patents-foundation intellectual property |  |  | 1,377,863 |  |  |  | (1,100,244 | ) |  |  | 277,619 |
Total |  |  | 1,377,863 |  |  |  | (1,100,244 | ) |  |  | 277,619 |

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